development build on otto-kesselgulasch

Hello,

I'm using GIMP development from the ppa:
//launchpad.net/~otto-kesselgulasch/+archive/ubuntu/gimp-edge. Until end
of december last year I used to see a weekly build of GIMP2.9.9. I
noticed in the ppa that the last build for my system (Ubuntu 16.04 LTS)
is from dec. 24 2017.

For other Ubuntu versions (17 & 18) there are later builds in the list.
Is this a mistake or should I upgrade to Ubuntu 18.04 (the next LTS
release I believe) to get the newest GIMP?